/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.pinterest.secor.common;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Topic partition group describes a kafka message topic-partitions pair.
 *
 * @author Henry Cai (hcai@pinterest.com)
 */
public class TopicPartitionGroup {
    private String mTopic;
    private int[] mPartitions;

    public TopicPartitionGroup(String topic, int[] partitions) {
        mTopic = topic;
        mPartitions = Arrays.copyOf(partitions, partitions.length);
    }

    public TopicPartitionGroup(TopicPartition tp) {
        this(tp.getTopic(), new int[]{tp.getPartition()});
    }

    public String getTopic() {
        return mTopic;
    }

    public int[] getPartitions() {
        return mPartitions;
    }

    public List<TopicPartition> getTopicPartitions() {
        List<TopicPartition> tps = new ArrayList<TopicPartition>();
        for (int p : mPartitions) {
            tps.add(new TopicPartition(mTopic, p));
        }
        return tps;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        TopicPartitionGroup that = (TopicPartitionGroup) o;

        if (!Arrays.equals(mPartitions, that.mPartitions)) return false;
        if (mTopic != null ? !mTopic.equals(that.mTopic) : that.mTopic != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = mTopic != null ? mTopic.hashCode() : 0;
        result = 31 * result + Arrays.hashCode(mPartitions);
        return result;
    }

    @Override
    public String toString() {
        return "TopicPartitionGroup{" +
                "mTopic='" + mTopic + '\'' +
                ", mPartitions=" + Arrays.toString(mPartitions) +
                '}';
    }
}
